Littelfuse MIDI Bolt-Down User Manual

Bolt-down Fuses

MIDI® STYLE BOLT-DOWN FUSE RATED 32V

Specifications

Interrupting Rating: 1000A @ 32 VDC
Voltage Rating: 32 VDC
Operating Temperature Range: -40˚C to + 125˚C
Housing: Out of thermoplastic
Terminal: Tin plated Copper
Mounting Torque M5: 4.5 Nm +/- 1Nm
Mounting Torque M6: 5.5-6.5 Nm +/- 1Nm (Except 23A)
Complies with: ISO 8820-5

Ordering Information

Part Number Package Size

0498xxx.H 100

0498xxx.M 1000

UL 248 Special Purpose Fuses

Time-Current Characteristics

Description

This MIDI® style fuse offers a bolt-on space saving fuse for high
current wiring protection and provides time delay characteristics
with “Diffusion Pill Technology”. The MIDI® was designed and
patented by Littelfuse.

% of Rating

75 – / – 360,000 s / –

100 360,000 s / – – / –

110 14,400 s / – – / –

150 90 s / 3,600 s – / –

200 3 s / 100 s 1 s / 15 s

300
350

500 0.1 s / 1 s 0.1 s / 1 s

Opening Time Min / Max (s)

23-125A 150-200A

0.3 s / 3 s
– / –

Ratings

Part Number Current Rating Housing Color Typ. Voltage Drop Cold Resistance I2t

0498023._

0498030._

0498040._ 40 A

0498050._ 50 A

0498060._ 60 A

0498070._ 70 A

0498080._ 80 A

0498100._

0498125._

0498150._

0498175._

0498200._

2

2

2

2

1,2

1,2

1,2

23 A 90 mV 3.43 mΩ 1,800 A²s

30 A 65 mV 2.06 mΩ 4,200 A²s

65 mV 1.398 mΩ 10,000 A²s

65 mV 1.025 mΩ 13,000 A²s

68 mV 0.865 mΩ 21,700 A²s

70 mV 0.72 mΩ 24,000 A²s

58 mV 0.541 mΩ 24,600 A²s

100 A 60 mV 0.457 mΩ 51,300 A2s

125 A 71 mV 0.394 mΩ 73,200 A²s

150 A 77 mV 0.323 mΩ 81,900 A²s

175A

200A

77 mV

77 mV

0.285 mΩ 100,000 A²s

0.261 mΩ 125,000 A²s

– / –

0.3 s / 3 s

Note 1: Short circuit protector only Note 2: not UL approved

www.littelfuse.com © 2012 Littelfuse • Transportation Products Catalog

MIDI Rerating Curve

85

90

95

100

105

110

115

-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120

Ambient Temperature (C)

Rerating Factor (% Rated Current)

Bolt-down Fuses

TIME IN S ECON DS

CURRENT IN AMPE RES

MIDI® ST YLE BOLT-DOWN FUSE RATED 32V

Dimensions

Dimensions in mm

Part Number

“A”

mm (inch)

0498023._ 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)

0498030._ 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)

0498040._ 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)

0498050._ 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)

0498060._ 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)

0498070._ 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)

0498080._ 0.41 (0.016) 4.0 (0.157) 8.0 (0.315)

0498100._ 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)

0498125._ 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)

0498150._ 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)

0498175._ 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)

0498200._ 0.63 (0.025) 4.3 (0.169) 8.3 (0.327)

“B”

mm (inch)

mm (inch)

“C”

Temperature Rerating Curve

Time-Current Characteristic Curves

TIME-CURREN T CHARACTERISTIC C URVES

1000

100

23A

10

70A

30A

60A

50A

40A

200A

175A

125A

150A

80A

100A

1

0.1

0.01
10 100 1000 10000

www.littelfuse.com © 2012 Littelfuse • Transportation Products Catalog